Not to belabor the details, but Simon Sebag Montefiore's biography of Stalin In the Court of the Red Tsar, describes Nikita Krushchev's rise from Ukrainian Communist Party leader to inside member of Stalin's court largely on the basis of his ability to outperform his quotas of Ukrainians killed month after month until the numbers totaled in the hundreds of thousands. This is the history whose loss Putin laments.
Putin must have another plan. He must have something more. He must have one more move to change the trajectory of the Ukrainian drama. Because if he doesn't, all that he tried to build will come crashing down, and that will be his legacy. Just one man riding across the taiga, a bare chested leader with no one following behind.